The answer for the first question would be water. It is the substance that is a compound since it is made up of different elements. For the second item, i think the best answer is phosphorus and nitrogen. They are the limiting nutrients. For the last item, the correct answer is reservoirs.
Water is H2O. hydrogen atom is H1 O2
so hydrogen atom is H2
Answer:
physical property
Explanation:
The same molecule is present through out the changes. Physical changes are related to physical properties since some measurements require that changes be made. Melting Point: As solid matter is heated it eventually melts or changes into a liquid state at the melting point.
hope it helps!
